Folding backpack



FIG. 1 is a perspective view from the front of a folding backpack folded close, showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a perspective view from the rear of the folding backpack unfolded open, showing our new design;

FIG. 9 is a front elevational view thereof;

FIG. 10 is a rear elevational view thereof;

FIG. 11 is a right side elevational view thereof;

FIG. 12 is a left side elevational view thereof;

FIG. 13 is a top plan view thereof;

FIG. 14 is a bottom plan view thereof; and,

FIG. 15 is a perspective view from the rear of the folding backpack unfolded open.

The broken lines in the drawings form no part of the claimed design. The broken line utensils seen in FIG. 15 are environmental subject matter that form no part of the claimed design. 

CLAIM The ornamental design for a folding backpack, as shown and described. 